1. Warm Up #4 #2 #1 The sum of twice a number and -6 is 9 more than the opposite of the number. Find the number. #3 Solve

2. Warm Up #1

3. #2

4. #3 Solve

5. Warm Up #4 The sum of twice a number and -6 is 9 more than the opposite of the number. Find the number.

6. Homework Find the missing values and (if linear) write an equation for each function: x0123423 y71115192327 x0123410 y-8-2371012 x0123423 y124-4-12?? Linear: _______ Equation: ___________ Practice Test 1 1. 2. 3. Yesy = 4x + 7 NoN/A Yesy = -8x + 12

7. Homework Practice Test 1 Define a variable, write an equation and solve. The sum of two numbers is 102. The second number is three less than two times the first. Find the numbers. The perimeter of a selected triangle is 114 inches. If one side is 4 less than three times the first and the other is two less than twice the first, what are the lengths of each side? 4. 5. 1 st # = x 2 nd # = 2x - 3 x + 2x – 3 = 102 3x – 3 = 102 3x = 105 1 st # = 35 2 nd # = 67 1 st side = x 2 nd side = 3x – 4 3 rd side = 2x - 2 6x – 6 = 114 6x = 120 1 st side = 20 2 nd side = 56 3 rd side = 38 6. 7. 8. Solve. a = -9 b = -80 c = 5

8. Test Practice Find the missing values and (if linear) write an equation for each function x0123417 y-7-42?? (4, 5) and (17, 41) y = 3x - 7 x0123422 y951-3?? (4, -7) and (22, -79) y = -4x + 9

9. Test Practice Find the missing values and (if linear) write an equation for each function x012347 y6432168?? (4, 4) and (7, 1) NOT linear – yes there is a pattern, but there is no constant rate of change x0123422 y17192123?? (4, 25) and (22, 61) y = 2x + 17

10. Test Practice Define a variable, write an equation and solve. Bubba is told to finish filling a huge library bookcase. The table below shows how many books are on the bookcase (b) after each minute (t) Bubba worked. Time (t)01234t Books (b)246262278294310b 1. Write an equation (function) that describes the number of books (b) on the bookcase after t minutes 2. If the bookcase holds 902 books, how long will it take Bubba to fill it? b = 16t + 246 902 = 16t + 246 656 = 16t 41 = t 41 minutes!

11. Test Practice #1 #2 #3 #4 #5 #6

12. #1

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17. #6